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Quantum Chemistry

Electrodynamics of a Coulomb glass in n-type silicon.

PubMed
Authors: Helgren E, Armitage NP, Grüner G

Year

2002

Paper ID

13123

Status

Peer-reviewed

Abstract Read

~2 min

Abstract Words

102

Citations

28

Abstract

Measurements of the complex frequency dependent conductivity of uncompensated n-type silicon are reported. The experiments are done in the quantum limit, variant Planck's over 2pi omega>k(B)T, across a broad doping range on the insulating side of the metal-insulator transition. The low energy linear frequency dependence is consistent with theories of a Coulomb glass, but discrepancies exist in the relative magnitudes of the complex components. At higher energies we observe a crossover to a quadratic frequency dependence that is sharper than expected. The concentration dependence gives evidence that the Coulomb interaction energy is the energy scale that determines this crossover.

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  • This paper contributes to the Quantum Chemistry research area in the Quantum Articles archive.
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  • Measurements of the complex frequency dependent conductivity of uncompensated n-type silicon are reported.

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References & Citation Signals

[1] DOI https://doi.org/10.1103/PhysRevLett.89.246601 [2] Publisher https://pubmed.ncbi.nlm.nih.gov/12484967/

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